It was (and mostly still is) so easy to avoid taxes in Greece that it's fair to say the burden is on the government more than the people. I believe it's difficult to make people tax-conscious when they see that it's so easy for everyone around them to steal. The tax authorities here are corrupt, underqualified, and have a very low rate of tax collection. It's so bad that it had better be replaced altogether.
That's a fair point. But it's true that the government took advantage of the tools offered to the country for free and unchecked by the EU (namely, subsidies and cheap credit lines) to lull people into a false sense of euphoria (To think that in 2000-2007 governments were proud for having the highest-growing economy in the EU (with borrowed money, of course)). There is an issue with EU's general lack of adequate checks on how EU money is spent in individual countries (esp. the south).
The perfect democracy achieving the will of all voters is not achievable, as different groups may promote conflicting policies. There are however parts that are consistent with all populace, and as the cabinets change you definitely can see what they do have in common.
Greek politicians are Greek people too, with same cultural background and overall attitudes prevailing in the society. Ditto for Greek government employees (a huge sector of their economy), who are there to enforce the regulations.
If there is a culture of tax evasion, you can't expect the government to fix it just because there is a tax code in the writing. People's attitude have to change.
